package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

import java.time.LocalDateTime;
import java.util.List;

import static org.springframework.beans.BeanUtils.*;

@Service
@Slf4j
public class CategoryServiceImp implements CategoryService {
    @Resource
    CategoryMapper categoryMapper;
    @Resource
    DishMapper dishMapper;
    @Resource
    SetmealMapper setmealMapper;

    @Override
    public void save(CategoryDTO categoryDTO) {
        Category category = new Category();

        copyProperties(categoryDTO, category);
        category.setStatus(0);
        categoryMapper.insert(category);
    }

    @Override
    public PageResult getPage(CategoryPageQueryDTO pageInfo) {
        PageHelper.startPage(pageInfo.getPage(), pageInfo.getPageSize());
        Page<Category> page = categoryMapper.getPage(pageInfo.getName(), pageInfo.getType());
        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    public Category getById(Integer id) {
        return categoryMapper.getById(id);
    }

    @Override
    public void startAndStop(Integer status, Long id) {
        Category build = Category.builder().id(id).status(status).build();
        categoryMapper.update(build);
    }

    @Override
    public void update(CategoryDTO categoryDTO) {
        Category c = new Category();
        BeanUtils.copyProperties(categoryDTO,c);
        categoryMapper.update(c);
    }

    @Override
    public void delete(Long id) {
        //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
        Integer count = dishMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }

        //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
        count = setmealMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        categoryMapper.delete(id);
    }

    @Override
    public List<Category> list(Integer type) {
        return categoryMapper.list(type);
    }
}
